Did you make this instructable?

It is EXTREMELY difficult to explain radio because you must have some knowledge of several different concepts. (amplifiers, oscillators, mixers, frequency modulation, amplitude modulation...I.F. section, etc etc. When you study each of the concepts and understand them... then you can put them together and you will understand radio. A.M. radio transmitters are the simplest. If the disc jockey is NOT talking, then the transmitter is sending out a high frequency "carrier" just a single frequency say.. 550 kilohertz. Think of it like a WATERHOSE spraying water. Now imagine the disc jockey starts TALKING. This makes the POWER of the 550 kilohertz signal MODULATE or increase/decrease with his voice. Kind of like the waterhose, but with someone stepping on it quickly... causes the water to spray (transmit) less and more as it is stepped on (modulated). The receiver uses tuned circuits and several other circuits that are even MORE difficult to explain in a short sentence... You should research the links Re-design gives....

thank you dude// here i am using some of the simple public address system, as i am going to make a school radio i think i dont want to deal with much higher prices.. so i am using a amplifier, a mixer with potentiometers, with a voltage amplifier& a trouble boost system... isn`t it ok???